Add resend confirmation email feature (#166)

docker-compose.dev.yaml

@@ -94,6 +94,7 @@ services:
       ACCESS_TOKEN_SECRET: "${ACCESS_TOKEN_SECRET}"
       REFRESH_TOKEN_SECRET: "${REFRESH_TOKEN_SECRET}"
       CONFIRMATION_TOKEN_SECRET: "${CONFIRMATION_TOKEN_SECRET}"
+      WEBSITE_BASE_URL: "${WEBSITE_BASE_URL}"
     restart: unless-stopped
     networks:
       - devnet

docker-compose.prod.yaml

@@ -69,6 +69,7 @@ services:
       ACCESS_TOKEN_SECRET: "${ACCESS_TOKEN_SECRET}"
       REFRESH_TOKEN_SECRET: "${REFRESH_TOKEN_SECRET}"
       CONFIRMATION_TOKEN_SECRET: "${CONFIRMATION_TOKEN_SECRET}"
+      WEBSITE_BASE_URL: "${WEBSITE_BASE_URL}"
     restart: unless-stopped
     networks:
       - prodnet

docker-compose.test.yaml

@@ -88,6 +88,7 @@ services:
       ACCESS_TOKEN_SECRET: "${ACCESS_TOKEN_SECRET}"
       REFRESH_TOKEN_SECRET: "${REFRESH_TOKEN_SECRET}"
       CONFIRMATION_TOKEN_SECRET: "${CONFIRMATION_TOKEN_SECRET}"
+      WEBSITE_BASE_URL: "${WEBSITE_BASE_URL}"
     volumes:
       - ./test-results:/app/test-results
     restart: "no"

docs/environment-variables.md

@@ -71,6 +71,9 @@ REFRESH_TOKEN_SECRET=<generated-secret>             # Signs long-lived refresh t
 
 # Confirmation token secret (30-minute tokens)
 CONFIRMATION_TOKEN_SECRET=<generated-secret>        # Signs email confirmation tokens
+
+# Website base URL (used in confirmation emails)
+WEBSITE_BASE_URL=https://thebiergarten.app          # Base URL for the website
 ```
 
 **Security Requirements**:
@@ -292,6 +295,7 @@ touch .env.local
 | `ACCESS_TOKEN_SECRET`               |    ✓    |          |   ✓    |   Yes    | Access token secret       |
 | `REFRESH_TOKEN_SECRET`              |    ✓    |          |   ✓    |   Yes    | Refresh token secret      |
 | `CONFIRMATION_TOKEN_SECRET`         |    ✓    |          |   ✓    |   Yes    | Confirmation token secret |
+| `WEBSITE_BASE_URL`                  |    ✓    |          |        |   Yes    | Website URL for emails    |
 | **Authentication (Frontend)**       |
 | `CONFIRMATION_TOKEN_SECRET`         |         |    ✓     |        |   Yes    | Email confirmation        |
 | `RESET_PASSWORD_TOKEN_SECRET`       |         |    ✓     |        |   Yes    | Password reset            |
@@ -359,6 +363,7 @@ DB_PASSWORD=Dev_Password_123!
 ACCESS_TOKEN_SECRET=<generated-with-openssl>
 REFRESH_TOKEN_SECRET=<generated-with-openssl>
 CONFIRMATION_TOKEN_SECRET=<generated-with-openssl>
+WEBSITE_BASE_URL=http://localhost:3000
 
 # Migration
 CLEAR_DATABASE=true

src/Core/API/API.Core/Controllers/AuthController.cs

@@ -1,6 +1,7 @@
 using API.Core.Contracts.Auth;
 using API.Core.Contracts.Common;
 using Domain.Entities;
+using Microsoft.AspNetCore.Authorization;
 using Microsoft.AspNetCore.Mvc;
 using Service.Auth;
 
@@ -8,6 +9,7 @@ namespace API.Core.Controllers
 {
     [ApiController]
     [Route("api/[controller]")]
+    [Authorize(AuthenticationSchemes = "JWT")]
     public class AuthController(
         IRegisterService registerService,
         ILoginService loginService,
@@ -15,6 +17,7 @@ namespace API.Core.Controllers
         ITokenService tokenService
     ) : ControllerBase
     {
+        [AllowAnonymous]
         [HttpPost("register")]
         public async Task<ActionResult<UserAccount>> Register(
             [FromBody] RegisterRequest req
@@ -47,6 +50,7 @@ namespace API.Core.Controllers
             return Created("/", response);
         }
 
+        [AllowAnonymous]
         [HttpPost("login")]
         public async Task<ActionResult> Login([FromBody] LoginRequest req)
         {
@@ -82,6 +86,7 @@ namespace API.Core.Controllers
             );
         }
 
+        [AllowAnonymous]
         [HttpPost("refresh")]
         public async Task<ActionResult> Refresh(
             [FromBody] RefreshTokenRequest req

src/Core/API/API.Specs/Features/Confirmation.feature

@@ -6,6 +6,7 @@ Feature: User Account Confirmation
       Given the API is running
       And I have registered a new account
       And I have a valid confirmation token for my account
+      And I have a valid access token for my account
       When I submit a confirmation request with the valid token
       Then the response has HTTP status 200
       And the response JSON should have "message" containing "is confirmed"
@@ -14,6 +15,7 @@ Feature: User Account Confirmation
       Given the API is running
       And I have registered a new account
       And I have a valid confirmation token for my account
+      And I have a valid access token for my account
       When I submit a confirmation request with the valid token
       And I submit the same confirmation request again
       Then the response has HTTP status 200
@@ -21,6 +23,8 @@ Feature: User Account Confirmation
 
    Scenario: Confirmation fails with invalid token
       Given the API is running
+      And I have registered a new account
+      And I have a valid access token for my account
       When I submit a confirmation request with an invalid token
       Then the response has HTTP status 401
       And the response JSON should have "message" containing "Invalid token"
@@ -29,6 +33,7 @@ Feature: User Account Confirmation
       Given the API is running
       And I have registered a new account
       And I have an expired confirmation token for my account
+      And I have a valid access token for my account
       When I submit a confirmation request with the expired token
       Then the response has HTTP status 401
       And the response JSON should have "message" containing "Invalid token"
@@ -37,12 +42,15 @@ Feature: User Account Confirmation
       Given the API is running
       And I have registered a new account
       And I have a confirmation token signed with the wrong secret
+      And I have a valid access token for my account
       When I submit a confirmation request with the tampered token
       Then the response has HTTP status 401
       And the response JSON should have "message" containing "Invalid token"
 
    Scenario: Confirmation fails when token is missing
       Given the API is running
+      And I have registered a new account
+      And I have a valid access token for my account
       When I submit a confirmation request with a missing token
       Then the response has HTTP status 400
 
@@ -54,6 +62,15 @@ Feature: User Account Confirmation
 
    Scenario: Confirmation fails with malformed token
       Given the API is running
+      And I have registered a new account
+      And I have a valid access token for my account
       When I submit a confirmation request with a malformed token
       Then the response has HTTP status 401
       And the response JSON should have "message" containing "Invalid token"
+
+   Scenario: Confirmation fails without an access token
+      Given the API is running
+      And I have registered a new account
+      And I have a valid confirmation token for my account
+      When I submit a confirmation request with the valid token without an access token
+      Then the response has HTTP status 401

src/Core/API/API.Specs/Features/ResendConfirmation.feature

@@ -0,0 +1,36 @@
+Feature: Resend Confirmation Email
+   As a user who did not receive the confirmation email
+   I want to request a resend of the confirmation email
+   So that I can obtain a working confirmation link while preventing abuse
+
+   Scenario: Legitimate resend for an unconfirmed user
+      Given the API is running
+      And I have registered a new account
+      And I have a valid access token for my account
+      When I submit a resend confirmation request for my account
+      Then the response has HTTP status 200
+      And the response JSON should have "message" containing "confirmation email has been resent"
+
+   Scenario: Resend is a no-op for an already confirmed user
+      Given the API is running
+      And I have registered a new account
+      And I have a valid confirmation token for my account
+      And I have a valid access token for my account
+      And I have confirmed my account
+      When I submit a resend confirmation request for my account
+      Then the response has HTTP status 200
+      And the response JSON should have "message" containing "confirmation email has been resent"
+
+   Scenario: Resend is a no-op for a non-existent user
+      Given the API is running
+      And I have registered a new account
+      And I have a valid access token for my account
+      When I submit a resend confirmation request for a non-existent user
+      Then the response has HTTP status 200
+      And the response JSON should have "message" containing "confirmation email has been resent"
+
+   Scenario: Resend requires authentication
+      Given the API is running
+      And I have registered a new account
+      When I submit a resend confirmation request without an access token
+      Then the response has HTTP status 401

src/Core/API/API.Specs/Mocks/MockEmailService.cs

@@ -7,6 +7,8 @@ public class MockEmailService : IEmailService
 {
     public List<RegistrationEmail> SentRegistrationEmails { get; } = new();
 
+    public List<ResendConfirmationEmail> SentResendConfirmationEmails { get; } = new();
+
     public Task SendRegistrationEmailAsync(
         UserAccount createdUser,
         string confirmationToken
@@ -24,9 +26,27 @@ public class MockEmailService : IEmailService
         return Task.CompletedTask;
     }
 
+    public Task SendResendConfirmationEmailAsync(
+        UserAccount user,
+        string confirmationToken
+    )
+    {
+        SentResendConfirmationEmails.Add(
+            new ResendConfirmationEmail
+            {
+                UserAccount = user,
+                ConfirmationToken = confirmationToken,
+                SentAt = DateTime.UtcNow,
+            }
+        );
+
+        return Task.CompletedTask;
+    }
+
     public void Clear()
     {
         SentRegistrationEmails.Clear();
+        SentResendConfirmationEmails.Clear();
     }
 
     public class RegistrationEmail
@@ -35,4 +55,11 @@ public class MockEmailService : IEmailService
         public string ConfirmationToken { get; init; } = string.Empty;
         public DateTime SentAt { get; init; }
     }
+
+    public class ResendConfirmationEmail
+    {
+        public UserAccount UserAccount { get; init; } = null!;
+        public string ConfirmationToken { get; init; } = string.Empty;
+        public DateTime SentAt { get; init; }
+    }
 }

src/Core/API/API.Specs/Steps/AuthSteps.cs

@@ -457,6 +457,32 @@ public class AuthSteps(ScenarioContext scenario)
         await GivenIAmLoggedIn();
     }
 
+    [Given("I have a valid access token for my account")]
+    public void GivenIHaveAValidAccessTokenForMyAccount()
+    {
+        var userId = scenario.TryGetValue<Guid>(RegisteredUserIdKey, out var id)
+            ? id
+            : throw new InvalidOperationException(
+                "registered user ID not found in scenario"
+            );
+        var username = scenario.TryGetValue<string>(
+            RegisteredUsernameKey,
+            out var user
+        )
+            ? user
+            : throw new InvalidOperationException(
+                "registered username not found in scenario"
+            );
+
+        var secret = GetRequiredEnvVar("ACCESS_TOKEN_SECRET");
+        scenario["accessToken"] = GenerateJwtToken(
+            userId,
+            username,
+            secret,
+            DateTime.UtcNow.AddMinutes(60)
+        );
+    }
+
     [Given("I have a valid confirmation token for my account")]
     public void GivenIHaveAValidConfirmationTokenForMyAccount()
     {
@@ -587,11 +613,16 @@ public class AuthSteps(ScenarioContext scenario)
         var token = scenario.TryGetValue<string>("confirmationToken", out var t)
             ? t
             : "valid-token";
+        var accessToken = scenario.TryGetValue<string>("accessToken", out var at)
+            ? at
+            : string.Empty;
 
         var requestMessage = new HttpRequestMessage(
             HttpMethod.Post,
             $"/api/auth/confirm?token={Uri.EscapeDataString(token)}"
         );
+        if (!string.IsNullOrEmpty(accessToken))
+            requestMessage.Headers.Add("Authorization", $"Bearer {accessToken}");
 
         var response = await client.SendAsync(requestMessage);
         var responseBody = await response.Content.ReadAsStringAsync();
@@ -606,11 +637,16 @@ public class AuthSteps(ScenarioContext scenario)
         var token = scenario.TryGetValue<string>("confirmationToken", out var t)
             ? t
             : "valid-token";
+        var accessToken = scenario.TryGetValue<string>("accessToken", out var at)
+            ? at
+            : string.Empty;
 
         var requestMessage = new HttpRequestMessage(
             HttpMethod.Post,
             $"/api/auth/confirm?token={Uri.EscapeDataString(token)}"
         );
+        if (!string.IsNullOrEmpty(accessToken))
+            requestMessage.Headers.Add("Authorization", $"Bearer {accessToken}");
 
         var response = await client.SendAsync(requestMessage);
         var responseBody = await response.Content.ReadAsStringAsync();
@@ -623,11 +659,16 @@ public class AuthSteps(ScenarioContext scenario)
     {
         var client = GetClient();
         const string token = "malformed-token-not-jwt";
+        var accessToken = scenario.TryGetValue<string>("accessToken", out var at)
+            ? at
+            : string.Empty;
 
         var requestMessage = new HttpRequestMessage(
             HttpMethod.Post,
             $"/api/auth/confirm?token={Uri.EscapeDataString(token)}"
         );
+        if (!string.IsNullOrEmpty(accessToken))
+            requestMessage.Headers.Add("Authorization", $"Bearer {accessToken}");
 
         var response = await client.SendAsync(requestMessage);
         var responseBody = await response.Content.ReadAsStringAsync();
@@ -883,11 +924,16 @@ public class AuthSteps(ScenarioContext scenario)
         var token = scenario.TryGetValue<string>("confirmationToken", out var t)
             ? t
             : "expired-confirmation-token";
+        var accessToken = scenario.TryGetValue<string>("accessToken", out var at)
+            ? at
+            : string.Empty;
 
         var requestMessage = new HttpRequestMessage(
             HttpMethod.Post,
             $"/api/auth/confirm?token={Uri.EscapeDataString(token)}"
         );
+        if (!string.IsNullOrEmpty(accessToken))
+            requestMessage.Headers.Add("Authorization", $"Bearer {accessToken}");
 
         var response = await client.SendAsync(requestMessage);
         var responseBody = await response.Content.ReadAsStringAsync();
@@ -902,11 +948,16 @@ public class AuthSteps(ScenarioContext scenario)
         var token = scenario.TryGetValue<string>("confirmationToken", out var t)
             ? t
             : "tampered-confirmation-token";
+        var accessToken = scenario.TryGetValue<string>("accessToken", out var at)
+            ? at
+            : string.Empty;
 
         var requestMessage = new HttpRequestMessage(
             HttpMethod.Post,
             $"/api/auth/confirm?token={Uri.EscapeDataString(token)}"
         );
+        if (!string.IsNullOrEmpty(accessToken))
+            requestMessage.Headers.Add("Authorization", $"Bearer {accessToken}");
 
         var response = await client.SendAsync(requestMessage);
         var responseBody = await response.Content.ReadAsStringAsync();
@@ -918,7 +969,13 @@ public class AuthSteps(ScenarioContext scenario)
     public async Task WhenISubmitAConfirmationRequestWithAMissingToken()
     {
         var client = GetClient();
+        var accessToken = scenario.TryGetValue<string>("accessToken", out var at)
+            ? at
+            : string.Empty;
+
         var requestMessage = new HttpRequestMessage(HttpMethod.Post, "/api/auth/confirm");
+        if (!string.IsNullOrEmpty(accessToken))
+            requestMessage.Headers.Add("Authorization", $"Bearer {accessToken}");
 
         var response = await client.SendAsync(requestMessage);
         var responseBody = await response.Content.ReadAsStringAsync();
@@ -974,6 +1031,30 @@ public class AuthSteps(ScenarioContext scenario)
     {
         var client = GetClient();
         const string token = "invalid-confirmation-token";
+        var accessToken = scenario.TryGetValue<string>("accessToken", out var at)
+            ? at
+            : string.Empty;
+
+        var requestMessage = new HttpRequestMessage(
+            HttpMethod.Post,
+            $"/api/auth/confirm?token={Uri.EscapeDataString(token)}"
+        );
+        if (!string.IsNullOrEmpty(accessToken))
+            requestMessage.Headers.Add("Authorization", $"Bearer {accessToken}");
+
+        var response = await client.SendAsync(requestMessage);
+        var responseBody = await response.Content.ReadAsStringAsync();
+        scenario[ResponseKey] = response;
+        scenario[ResponseBodyKey] = responseBody;
+    }
+
+    [When("I submit a confirmation request with the valid token without an access token")]
+    public async Task WhenISubmitAConfirmationRequestWithTheValidTokenWithoutAnAccessToken()
+    {
+        var client = GetClient();
+        var token = scenario.TryGetValue<string>("confirmationToken", out var t)
+            ? t
+            : "valid-token";
 
         var requestMessage = new HttpRequestMessage(
             HttpMethod.Post,
@@ -1043,4 +1124,91 @@ public class AuthSteps(ScenarioContext scenario)
             refreshToken.Should().NotBe(previousRefreshToken);
         }
     }
+
+    [Given("I have confirmed my account")]
+    public async Task GivenIHaveConfirmedMyAccount()
+    {
+        var client = GetClient();
+        var token = scenario.TryGetValue<string>("confirmationToken", out var t)
+            ? t
+            : throw new InvalidOperationException("confirmation token not found");
+        var accessToken = scenario.TryGetValue<string>("accessToken", out var at)
+            ? at
+            : string.Empty;
+
+        var requestMessage = new HttpRequestMessage(
+            HttpMethod.Post,
+            $"/api/auth/confirm?token={Uri.EscapeDataString(token)}"
+        );
+        if (!string.IsNullOrEmpty(accessToken))
+            requestMessage.Headers.Add("Authorization", $"Bearer {accessToken}");
+
+        var response = await client.SendAsync(requestMessage);
+        response.EnsureSuccessStatusCode();
+    }
+
+    [When("I submit a resend confirmation request for my account")]
+    public async Task WhenISubmitAResendConfirmationRequestForMyAccount()
+    {
+        var client = GetClient();
+        var userId = scenario.TryGetValue<Guid>(RegisteredUserIdKey, out var id)
+            ? id
+            : throw new InvalidOperationException("registered user ID not found");
+        var accessToken = scenario.TryGetValue<string>("accessToken", out var at)
+            ? at
+            : string.Empty;
+
+        var requestMessage = new HttpRequestMessage(
+            HttpMethod.Post,
+            $"/api/auth/confirm/resend?userId={userId}"
+        );
+        if (!string.IsNullOrEmpty(accessToken))
+            requestMessage.Headers.Add("Authorization", $"Bearer {accessToken}");
+
+        var response = await client.SendAsync(requestMessage);
+        var responseBody = await response.Content.ReadAsStringAsync();
+        scenario[ResponseKey] = response;
+        scenario[ResponseBodyKey] = responseBody;
+    }
+
+    [When("I submit a resend confirmation request for a non-existent user")]
+    public async Task WhenISubmitAResendConfirmationRequestForANonExistentUser()
+    {
+        var client = GetClient();
+        var fakeUserId = Guid.NewGuid();
+        var accessToken = scenario.TryGetValue<string>("accessToken", out var at)
+            ? at
+            : string.Empty;
+
+        var requestMessage = new HttpRequestMessage(
+            HttpMethod.Post,
+            $"/api/auth/confirm/resend?userId={fakeUserId}"
+        );
+        if (!string.IsNullOrEmpty(accessToken))
+            requestMessage.Headers.Add("Authorization", $"Bearer {accessToken}");
+
+        var response = await client.SendAsync(requestMessage);
+        var responseBody = await response.Content.ReadAsStringAsync();
+        scenario[ResponseKey] = response;
+        scenario[ResponseBodyKey] = responseBody;
+    }
+
+    [When("I submit a resend confirmation request without an access token")]
+    public async Task WhenISubmitAResendConfirmationRequestWithoutAnAccessToken()
+    {
+        var client = GetClient();
+        var userId = scenario.TryGetValue<Guid>(RegisteredUserIdKey, out var id)
+            ? id
+            : Guid.NewGuid();
+
+        var requestMessage = new HttpRequestMessage(
+            HttpMethod.Post,
+            $"/api/auth/confirm/resend?userId={userId}"
+        );
+
+        var response = await client.SendAsync(requestMessage);
+        var responseBody = await response.Content.ReadAsStringAsync();
+        scenario[ResponseKey] = response;
+        scenario[ResponseBodyKey] = responseBody;
+    }
 }

src/Core/Infrastructure/Infrastructure.Email.Templates/Mail/ResendConfirmation.razor

@@ -0,0 +1,117 @@
+@using Infrastructure.Email.Templates.Components
+
+<!DOCTYPE html>
+<html lang="en" xmlns="http://www.w3.org/1999/xhtml" xmlns:v="urn:schemas-microsoft-com:vml"
+      xmlns:o="urn:schemas-microsoft-com:office:office">
+
+<head>
+   <meta charset="utf-8">
+   <meta name="viewport" content="width=device-width">
+   <meta http-equiv="X-UA-Compatible" content="IE=edge">
+   <meta name="x-apple-disable-message-reformatting">
+   <title>Resend Confirmation - The Biergarten App</title>
+   <!--[if mso]>
+    <style>
+     * { font-family: Arial, sans-serif !important; }
+     table { border-collapse: collapse; }
+    </style>
+    <![endif]-->
+   <!--[if !mso]><!-->
+   <style>
+         * {
+            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
+         }
+   </style>
+   <!--<![endif]-->
+</head>
+
+<body style="margin:0; padding:0; background-color:#f4f4f4; width:100%;">
+   <table role="presentation" border="0" cellpadding="0" cellspacing="0" width="100%" style="background-color:#f4f4f4;">
+      <tr>
+         <td align="center" style="padding:40px 10px;">
+            <!--[if mso]>
+          <table border="0" cellpadding="0" cellspacing="0" width="600" style="width:600px;">
+          <tr><td>
+          <![endif]-->
+            <table role="presentation" border="0" cellpadding="0" cellspacing="0" width="100%"
+                   style="max-width:600px; background:#ffffff; border-radius:8px; box-shadow:0 2px 8px rgba(0,0,0,.08);">
+
+               <Header />
+
+               <tr>
+                  <td style="padding:40px 40px 16px 40px; text-align:center;">
+                     <h1 style="margin:0; color:#333333; font-size:26px; font-weight:700;">
+                        New Confirmation Link
+                     </h1>
+                  </td>
+               </tr>
+
+               <tr>
+                  <td style="padding:0 40px 20px 40px; text-align:center;">
+                     <p style="margin:0; color:#666666; font-size:16px; line-height:24px;">
+                        Hi <strong style="color:#333333;">@Username</strong>, you requested another email confirmation
+                        link.
+                        Use the button below to verify your account.
+                     </p>
+                  </td>
+               </tr>
+
+               <tr>
+                  <td style="padding:8px 40px;">
+                     <table role="presentation" border="0" cellpadding="0" cellspacing="0" width="100%">
+                        <tr>
+                           <td align="center">
+                              <!--[if mso]>
+                      <v:roundrect xmlns:v="urn:schemas-microsoft-com:vml" xmlns:w="urn:schemas-microsoft-com:office:word"
+                             href="@ConfirmationLink" style="height:50px;v-text-anchor:middle;width:260px;"
+                             arcsize="10%" stroke="f" fillcolor="#f59e0b">
+                       <w:anchorlock/>
+                       <center style="color:#ffffff;font-family:Arial,sans-serif;font-size:16px;font-weight:700;">
+                        Confirm Email Again
+                       </center>
+                      </v:roundrect>
+                      <![endif]-->
+                              <!--[if !mso]><!-->
+                              <a href="@ConfirmationLink" target="_blank" rel="noopener noreferrer"
+                                 style="display:inline-block; padding:16px 40px; background:#d97706; color:#ffffff; text-decoration:none; border-radius:6px; font-size:16px; font-weight:700;">
+                                 Confirm Email Again
+                              </a>
+                              <!--<![endif]-->
+                           </td>
+                        </tr>
+                     </table>
+                  </td>
+               </tr>
+
+               <tr>
+                  <td style="padding:20px 40px 8px 40px; text-align:center;">
+                     <p style="margin:0; color:#999999; font-size:13px; line-height:20px;">
+                        This replacement link expires in 24 hours.
+                     </p>
+                  </td>
+               </tr>
+
+               <tr>
+                  <td style="padding:0 40px 28px 40px; text-align:center;">
+                     <p style="margin:0; color:#999999; font-size:13px; line-height:20px;">
+                        If you did not request this, you can safely ignore this email.
+                     </p>
+                  </td>
+               </tr>
+
+               <EmailFooter FooterText="Cheers, The Biergarten App Team" />
+            </table>
+            <!--[if mso]></td></tr></table><![endif]-->
+         </td>
+      </tr>
+   </table>
+</body>
+</html>
+
+@code {
+   [Parameter]
+   public string Username { get; set; } = string.Empty;
+
+   [Parameter]
+   public string ConfirmationLink { get; set; } = string.Empty;
+}

src/Core/Infrastructure/Infrastructure.Email.Templates/Rendering/EmailTemplateProvider.cs

@@ -30,6 +30,23 @@ public class EmailTemplateProvider(
         return await RenderComponentAsync<UserRegistration>(parameters);
     }
 
+    /// <summary>
+    /// Renders the ResendConfirmation template with the specified parameters.
+    /// </summary>
+    public async Task<string> RenderResendConfirmationEmailAsync(
+        string username,
+        string confirmationLink
+    )
+    {
+        var parameters = new Dictionary<string, object?>
+        {
+            { nameof(ResendConfirmation.Username), username },
+            { nameof(ResendConfirmation.ConfirmationLink), confirmationLink },
+        };
+
+        return await RenderComponentAsync<ResendConfirmation>(parameters);
+    }
+
     /// <summary>
     /// Generic method to render any Razor component to HTML.
     /// </summary>

src/Core/Infrastructure/Infrastructure.Email.Templates/Rendering/IEmailTemplateProvider.cs

@@ -15,4 +15,15 @@ public interface IEmailTemplateProvider
         string username,
         string confirmationLink
     );
+
+    /// <summary>
+    /// Renders the ResendConfirmation template with the specified parameters.
+    /// </summary>
+    /// <param name="username">The username to include in the email</param>
+    /// <param name="confirmationLink">The new confirmation link</param>
+    /// <returns>The rendered HTML string</returns>
+    Task<string> RenderResendConfirmationEmailAsync(
+        string username,
+        string confirmationLink
+    );
 }

src/Core/Infrastructure/Infrastructure.Repository/Auth/AuthRepository.cs

@@ -159,7 +159,7 @@ public class AuthRepository(ISqlConnectionFactory connectionFactory)
         return await GetUserByIdAsync(userAccountId);
     }
 
-    private async Task<bool> IsUserVerifiedAsync(Guid userAccountId)
+    public async Task<bool> IsUserVerifiedAsync(Guid userAccountId)
     {
         await using var connection = await CreateConnection();
         await using var command = connection.CreateCommand();

src/Core/Infrastructure/Infrastructure.Repository/Auth/IAuthRepository.cs

@@ -75,4 +75,11 @@ public interface IAuthRepository
     /// <param name="userAccountId">ID of the user account</param>
     /// <returns>UserAccount if found, null otherwise</returns>
     Task<Domain.Entities.UserAccount?> GetUserByIdAsync(Guid userAccountId);
+
+    /// <summary>
+    /// Checks whether a user account has been verified.
+    /// </summary>
+    /// <param name="userAccountId">ID of the user account</param>
+    /// <returns>True if the user has a verification record, false otherwise</returns>
+    Task<bool> IsUserVerifiedAsync(Guid userAccountId);
 }

src/Core/Service/Service.Auth.Tests/ConfirmationService.test.cs

@@ -5,6 +5,7 @@ using Domain.Exceptions;
 using FluentAssertions;
 using Infrastructure.Repository.Auth;
 using Moq;
+using Service.Emails;
 
 namespace Service.Auth.Tests;
 
@@ -12,16 +13,19 @@ public class ConfirmationServiceTest
 {
     private readonly Mock<IAuthRepository> _authRepositoryMock;
     private readonly Mock<ITokenService> _tokenServiceMock;
+    private readonly Mock<IEmailService> _emailServiceMock;
     private readonly ConfirmationService _confirmationService;
 
     public ConfirmationServiceTest()
     {
         _authRepositoryMock = new Mock<IAuthRepository>();
         _tokenServiceMock = new Mock<ITokenService>();
+        _emailServiceMock = new Mock<IEmailService>();
 
         _confirmationService = new ConfirmationService(
             _authRepositoryMock.Object,
-          _tokenServiceMock.Object
+            _tokenServiceMock.Object,
+            _emailServiceMock.Object
         );
     }
 

src/Core/Service/Service.Auth/ConfirmationService.cs

@@ -1,12 +1,14 @@
 
 using Domain.Exceptions;
 using Infrastructure.Repository.Auth;
+using Service.Emails;
 
 namespace Service.Auth;
 
 public class ConfirmationService(
     IAuthRepository authRepository,
-    ITokenService tokenService
+    ITokenService tokenService,
+    IEmailService emailService
 ) : IConfirmationService
 {
     public async Task<ConfirmationServiceReturn> ConfirmUserAsync(
@@ -31,4 +33,21 @@ public class ConfirmationService(
             user.UserAccountId
         );
     }
+
+    public async Task ResendConfirmationEmailAsync(Guid userId)
+    {
+        var user = await authRepository.GetUserByIdAsync(userId);
+        if (user == null)
+        {
+            return; // Silent return to prevent user enumeration
+        }
+
+        if (await authRepository.IsUserVerifiedAsync(userId))
+        {
+            return; // Already confirmed, no-op
+        }
+
+        var confirmationToken = tokenService.GenerateConfirmationToken(user);
+        await emailService.SendResendConfirmationEmailAsync(user, confirmationToken);
+    }
 }

src/Core/Service/Service.Auth/IConfirmationService.cs

@@ -8,4 +8,6 @@ public record ConfirmationServiceReturn(DateTime ConfirmedAt, Guid UserId);
 public interface IConfirmationService
 {
     Task<ConfirmationServiceReturn> ConfirmUserAsync(string confirmationToken);
+    Task ResendConfirmationEmailAsync(Guid userId);
+
 }

src/Core/Service/Service.Emails/EmailService.cs

@@ -10,6 +10,11 @@ public interface IEmailService
         UserAccount createdUser,
         string confirmationToken
     );
+
+    public Task SendResendConfirmationEmailAsync(
+        UserAccount user,
+        string confirmationToken
+    );
 }
 
 public class EmailService(
@@ -17,13 +22,17 @@ public class EmailService(
     IEmailTemplateProvider emailTemplateProvider
 ) : IEmailService
 {
+    private static readonly string WebsiteBaseUrl =
+        Environment.GetEnvironmentVariable("WEBSITE_BASE_URL")
+        ?? throw new InvalidOperationException("WEBSITE_BASE_URL environment variable is not set");
+
     public async Task SendRegistrationEmailAsync(
         UserAccount createdUser,
         string confirmationToken
     )
     {
         var confirmationLink =
-            $"https://thebiergarten.app/confirm?token={confirmationToken}";
+            $"{WebsiteBaseUrl}/users/confirm?token={confirmationToken}";
 
         var emailHtml =
             await emailTemplateProvider.RenderUserRegisteredEmailAsync(
@@ -38,4 +47,26 @@ public class EmailService(
             isHtml: true
         );
     }
+
+    public async Task SendResendConfirmationEmailAsync(
+        UserAccount user,
+        string confirmationToken
+    )
+    {
+        var confirmationLink =
+            $"{WebsiteBaseUrl}/users/confirm?token={confirmationToken}";
+
+        var emailHtml =
+            await emailTemplateProvider.RenderResendConfirmationEmailAsync(
+                user.FirstName,
+                confirmationLink
+            );
+
+        await emailProvider.SendAsync(
+            user.Email,
+            "Confirm Your Email - The Biergarten App",
+            emailHtml,
+            isHtml: true
+        );
+    }
 }